@tintin,
Cafeteria plans can be used for certain types of individual pension investment plans (such as a Roth IRA), but those are very restricted--at the time i investigated these for my last employer, the IRS had a very short list. They are also used for medical and dental "savings accounts," as i mentioned. Many employers in the United States do not provide dental care, or provide very little in the way of dental care, so cafeteria plans are very popular for that purpose. By the same token, many health care plans do not provide prescription medicine coverage, or have a very high co-pay (the amount a certificate holder has to pay before the insurance pays), and employees often use cafeteria plan benefits to pay that portion of the prescription cost. They can also be used to set up temporary disability accounts (you are injured, but not permanently, but need income while you are unable to work). In my experience, an accountant or tax adviser is going to recommend an annual enrollment for any cafeteria plan payments, or for changing the use of the cafeteria plan funds. That means the employee will have to choose how they intend to use that money, and if they change their mind the following year, the funds from the previous year can only go to the purpose chosen then, and new cafeteria plan funds can only be used for the purpose the employee has elected to change to. So, if you dedicated your funds to a medical savings account last year, but now expect that you or one of your dependents will have high prescription medicine costs this year, the funds from last year can only be spent to pay medical costs other than prescription drugs, and the funds from this year cannot be spent on anything other than prescription drugs. This sort of provision is the only way the IRS can assure that employees are not simply using the funds as a means of getting tax-free income. I don't recall the details, but if you don't use your medical savings plan funds within a certain period of time, you lose them.
Cafeteria is not a misnomer, it is just a figurative use of the word. As is the case in a cafeteria, you have several options to choose from.
By the way, i reread your opening post, and realized that you wrote "earlier" and not "either" in that question. You might better have written:
I have never heard this kind of plan before.